发明名称 |
CONTROL SYSTEM FOR HYDRAULIC CIRCUIT |
摘要 |
A control system for a hydraulic circuit having an on-off valve interposed between the control valve and the actuator for allowing and blocking a flow of hydraulic fluid therebetween in which the control valve and on-off valves are actuated and switched in accordance with an operation signal from an operation device. Pressure sensors are connected to hydraulic lines upstream and downstream of the on-off valves for detecting the pressures in these hydraulic lines, and control unit is operative to calculate, based on the pressures detected by the pressure sensors, a value which reduces the difference between thrusts applied to the actuator and output the calculated value to the control valve while the on-off valves are closed to thereby perform pressure matching control. |
申请公布号 |
DE3660226(D1) |
申请公布日期 |
1988.06.30 |
申请号 |
DE19863660226 |
申请日期 |
1986.02.03 |
申请人 |
HITACHI CONSTRUCTION MACHINERY CO., LTD. |
发明人 |
NAKAJIMA, KICHIO TSUKUBA HOUSE 14-203;HONMA, KAZUO;TOKAIRIN, HIROAKI |
分类号 |
E02F9/22;F15B21/08;(IPC1-7):F15B21/08;F15B13/01 |
主分类号 |
E02F9/22 |
代理机构 |
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代理人 |
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